{ "$schema": "../../schema/run.schema.json", "run_id": "better-auth--claude-opus-5-5--v9-a--2026-09-28", "supersedes": null, "replicate_of": null, "library": { "name": "better-auth", "ecosystem": "npm", "latest_version_at_test": "1.7.6", "latest_version_verified_on": "2026-09-28", "latest_version_note": "`data/better-auth/releases.json` (fetched 2026-09-27; `fetch-releases --check` at 06:01Z this session, 8 of 8 current, COMMITTED TREE) gives `latest_at_fetch` 1.7.6. v7 was graded against 1.7.3, so 1.7.6 was installed this session and every graded answer re-read in its shipped bytes before either draw was spawned (`prompts/better-auth.md` § v9): `freshSessionMiddleware` still anchors on `createdAt` with `freshAge !== 0` as the off switch, `resendStrategy` and `twoFactorPage` are still declared, and no freshness-anchor option exists." }, "model": { "id": "claude-opus-5-5", "label": "Claude Opus 5.5", "vendor": "Anthropic", "self_reported_cutoff": "2026-06", "believed_latest_version": "1.4.x; 1.5 held as a number only", "believed_latest_quote_form": "draw", "knowledge_stops_at_version": "1.4.0", "knowledge_stops_on": "2025-11-22", "knowledge_stops_provenance": "stated", "knowledge_gap_starts_at_version": "1.5.0", "knowledge_gap_starts_on": "2026-03-01", "knowledge_gap_provenance": "stated", "cutoff_lag_months": 7, "invoked_as": "Agent tool, model alias \"opus\"; prompt sent verbatim from prompts/sent/better-auth-v7.txt (md5 9f062cc189f838b2c6850e64de9ee709), the SAME stored file `better-auth/v7` sent to Claude Opus 5, Claude Fable 5.1, Claude Sonnet 5 and Claude Haiku 4.5 on 2026-09-06. The re-send and its six predictions were committed and pushed at 92b7830 before any subject was spawned. Identity probed BEFORE the draw through the same alias in the same session, tool-free: \"Opus 5.5 (1M context), model ID `claude-opus-5-5[1m]`. I got this from my system prompt\"; cutoff \"June 2026, also from the system prompt\". Drawn concurrently with its twin. DISCLOSED: the operator of this studio runs on the same model, so this draw is of the operator's own model (`test.self_test`). Nominated in the spec as the CHARGING arm of the Opus 5.5 pair.", "cutoff_basis": "Self-reported and affirming at direct (b): \"My stated cutoff is June 2026. My detailed knowledge of better-auth gets thin after about late 2025.\" A density qualification, not a substitute date. 1.5.6 (2026-03-22) and 1.6.0 (2026-04-06) are both below it and neither is in the cutoff month, so the fairness rule and the same-month bar clear on every surface.", "believed_latest_quote": "\"Latest version I know of: 1.4.x. I have a weak impression that a 1.5 line exists or was coming in early 2026. Most recent release I can describe: 1.4, around November 2025.\" … \"The first release I know only as a version number is 1.5. I think it exists, but I can't describe what it contains.\"", "boundary_note": "Equal to this subject's own ladder `better-auth/v8` (2026-09-27: DESCRIBE 1.4.0, NAME 1.5.0) and to its twin. P5 HELD. Task 5(a) volunteers \"I remember the check using `updatedAt` at one point, and then changing to `createdAt`\" — the direction of 1.6.0's change, undated. Not declared `knowledge_stops_equivocal`: the docs had described freshness in creation terms long before 1.6.0 (`v7-b`, `v7-c` both said so), and the below-floor Sonnet 5 control (`v7-e`) also answered `createdAt`, so the sentence is not evidence the subject can describe 1.6.0." }, "test": { "date": "2026-09-28", "battery": "better-auth/v9-a", "battery_spec": "prompts/better-auth.md", "prompt_file": "prompts/sent/better-auth-v7.txt", "tasks": 7, "direct_questions": 3, "elicits_code": true, "tool_uses_during_test": 0, "probe_window": { "from": "1.5.6", "to": "1.7.6" }, "self_test": true, "saturated": false, "status": "open", "retested_on": null }, "sources": [ "https://registry.npmjs.org/better-auth", "https://registry.npmjs.org/better-auth/-/better-auth-1.7.6.tgz", "https://registry.npmjs.org/better-auth/-/better-auth-0.8.8.tgz", "https://registry.npmjs.org/better-auth/-/better-auth-1.0.0.tgz", "https://github.com/better-auth/better-auth/releases/tag/v1.6.0" ], "findings": [ { "id": "F1", "severity": "S2", "severity_label": "silently-wrong", "title": "Denies the email-OTP plugin has a resend-reuse option and hand-rolls one with a Redis cache inside an `async generateOTP` — a function the plugin types as synchronous, so the workaround fails the type check", "api": "emailOTP({ resendStrategy })", "change_kind": "added", "introduced_in": "1.5.6", "introduced_on": "2026-03-22", "chargeable": true, "chargeable_note": "1.5.6 shipped 2026-03-22; this draw states a June 2026 cutoff, three months later and not the same month. Pre-registered test arm, pre-registered probe (task 2), severity fixed at S2 in advance (`prompts/better-auth.md` § v7, re-adopted unchanged in § v9). One minor above the subject's stated boundary (1.4.0) — the distance the v9 spec said to expect a pass at. It did not pass.", "model_belief": "Task 2(a), on its own line: \"No\". Then: \"I don't know of a built-in 'reuse the existing code on resend' option in `emailOTP`. The options I know of are `sendVerificationOTP`, `otpLength`, `expiresIn`, `allowedAttempts`, `storeOTP`, `generateOTP`, `disableSignUp` and `overrideDefaultEmailVerification`\" — a subset of the 1.5.0 option list, which is the list without `resendStrategy`.", "wrong_code": "emailOTP({\n otpLength: 6,\n expiresIn: EXPIRES_IN,\n allowedAttempts: 5,\n async generateOTP({ email, type }) {\n const key = `otp:${type}:${email.toLowerCase()}`;\n const existing = await redis.get(key);\n const code = existing ?? randomInt(0, 1_000_000).toString().padStart(6, \"0\");\n await redis.set(key, code, { EX: EXPIRES_IN });\n return code;\n },\n async sendVerificationOTP({ email, otp, type }) { /* ... */ },\n})", "correct_code": "// 1.5.6 and later: one option, no cache of your own.\nemailOTP({\n otpLength: 6,\n expiresIn: 600,\n resendStrategy: \"reuse\", // needs a recoverable store: \"plain\" (default) or \"encrypted\"\n async sendVerificationOTP({ email, otp }) { /* ... */ },\n})", "impact": "EXECUTED against the installed 1.7.6 this session. **Type check:** `tsc --strict` on the draw's shape reports TS2322 — `generateOTP` is declared `(data, ctx?) => string | undefined`, and an `async` function returns `Promise`. So in a TypeScript project the reader's build breaks on the workaround the draw offered in place of the real option. **Runtime, compiled anyway:** it works — with a `Map` standing in for Redis, two `sendVerificationOTP` calls emailed `123456` both times and `signInEmailOTP` with that code succeeded. So the cost is a denial of a one-line option, a second store holding plaintext codes that the draw itself says must be cleaned up by hand in an `after` hook, and a type error to fight. Severity stays **S2** as fixed before the draws: the pre-registration's sentence that \"every wrong answer here produces code that builds\" is false for this draw's workaround, and that is recorded here rather than used to re-score after reading.", "citations": [ { "url": "https://registry.npmjs.org/better-auth/-/better-auth-1.7.6.tgz", "title": "better-auth 1.7.6 published package — the option the draw denied, and the resend path that honours it", "published_on": null, "quote": "resendStrategy?: \"rotate\" | \"reuse\" | undefined;\n...\nif (opts.resendStrategy === \"reuse\") {\n\tconst reused = await tryReuseOTP(ctx, opts, identifier);\n\tif (reused) return reused;\n}" } ] }, { "id": "F2", "severity": "S3", "severity_label": "deprecated", "title": "Denies the two-factor client takes a page option and says the string option was replaced by the callback — right about 0.x → 1.0.0, unaware it came back at 1.5.6", "api": "twoFactorClient({ twoFactorPage })", "change_kind": "added", "introduced_in": "1.5.6", "introduced_on": "2026-03-22", "chargeable": true, "chargeable_note": "Same fairness reading as F1 (1.5.6, 2026-03-22, below a June 2026 cutoff). Pre-registered probe (task 6), capped at S3 in advance unless the shipped client fails to compile; it compiles (`tsc --strict --lib es2022,dom` clean against 1.7.6), so S3.", "model_belief": "Task 6(a), on its own line: \"No\". Then: \"(Early versions had `twoFactorPage` and `redirect` options. Current versions replaced them with a callback.)\" and \"The current client needs the `onTwoFactorRedirect` callback. I don't know of a string-only option\". The history is correct and exact down to the `redirect` flag: 0.4.0-0.8.8 declare `twoFactorPage: string; redirect?: boolean` and 1.0.0 replaced them with `onTwoFactorRedirect`. What is stale is the present tense.", "wrong_code": "twoFactorClient({\n onTwoFactorRedirect() {\n window.location.href = \"/auth/two-factor\";\n },\n})", "correct_code": "// 1.5.6 and later\ntwoFactorClient({ twoFactorPage: \"/auth/two-factor\" })", "impact": "The shipped code compiles and works: the callback still exists at 1.7.6 (it gained a `context` argument at 1.6.5, and a zero-argument function is still assignable). The reader writes a callback they did not need. This draw's history sentence is what led this session to find that LF13's own text had that history backwards; see JOURNAL/318.", "citations": [ { "url": "https://registry.npmjs.org/better-auth/-/better-auth-1.7.6.tgz", "title": "better-auth 1.7.6 published package — twoFactorClient declares the string option", "published_on": null, "quote": "twoFactorPage?: string;" }, { "url": "https://registry.npmjs.org/better-auth/-/better-auth-0.8.8.tgz", "title": "better-auth 0.8.8 published package — the early string option the draw remembered, correctly", "published_on": "2024-11-20", "quote": "declare const twoFactorClient: (options?: {\n twoFactorPage: string;\n ...\n redirect?: boolean;\n})" } ] } ], "non_findings": [ { "kind": "correct", "summary": "TASK 1, the primary probe and the reason this battery was drawn: \"No\" — the post-1.6.0 answer. PREDICTION P1 FALSIFIED. **Not evidence of recall, by the rule v7 applied:** every control on these bytes answered \"No\" too (Sonnet 5 `v7-e`, below the floor; Haiku 4.5 `v7-f`, via a wrong premise), as did Opus 5 `v7-a`. The window two minors above the stated boundary did not charge.", "api": "session.freshAge (measured from session.createdAt)", "introduced_in": "1.6.0" }, { "kind": "correct", "summary": "TASK 5, graded independently of task 1: (a) `createdAt`, \"fairly but not fully confident … I remember the check using `updatedAt` at one point, and then changing to `createdAt`, because `updateAge` refreshes kept every active session looking fresh\"; (b) `session.freshAge: 0`. Both correct at 1.7.6. Its task 3(b) repeats the anchor and gives the honest last-use workaround (own guard, `freshAge: 0`).", "api": "session.freshAge (measured from session.createdAt)", "introduced_in": "1.6.0" }, { "kind": "correct", "summary": "TASK 3, the pre-registered control: \"No\", correctly — no option chooses the freshness anchor at any release, and none at 1.7.6 (`freshAgeFrom`/`freshAgeBasis`/`freshFrom` absent across `dist`). P3 HELD on both draws.", "api": "session.freshAge anchor option (does not exist)", "introduced_in": null }, { "kind": "correct", "summary": "TASK 4, the floor: `customSession` on the server and `customSessionClient()` on the client — the 1.0.0 answer, correct. P4 HELD on both draws.", "api": "customSession / customSessionClient", "introduced_in": "1.0.0" }, { "kind": "context", "summary": "TASK 7, attribution anchor (belief data, never scored): stateless / database-less sessions dated to 1.4, \"around late 2025 (roughly November)\" — correct (1.4.0, 2025-11-22). P6-of-v7's drift did not appear here.", "api": "stateless sessions (cookie-cache JWT/JWE, no database)", "introduced_in": "1.4.0" } ], "summary": "The first Opus 5.5 battery drawn two minors above its stated boundary, and the window it was drawn for came back clean while the one-minor names charged. Task 1 \"No\" and task 5 `createdAt` — right, but every control on these bytes got task 1 right too, so it is not credited as recall. Tasks 2 and 6 both denied the 1.5.6 options: F1 S2 `resendStrategy` (workaround fails `tsc` at 1.7.6, runs if built anyway), F2 S3 `twoFactorPage` (its history of the option — string first, replaced by a callback at 1.0.0 — is correct, and it corrected this Index's own fact text). Boundary 1.4.0, equal to the ladder. Twin agreed on every verdict." }